CN104868622A - Manufacture Method Of Induction Motor And Rotor - Google Patents
Manufacture Method Of Induction Motor And Rotor Download PDFInfo
- Publication number
- CN104868622A CN104868622A CN201510088667.6A CN201510088667A CN104868622A CN 104868622 A CN104868622 A CN 104868622A CN 201510088667 A CN201510088667 A CN 201510088667A CN 104868622 A CN104868622 A CN 104868622A
- Authority
- CN
- China
- Prior art keywords
- good conductor
- conductor parts
- end ring
- induction motor
- aluminium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000006698 induction Effects 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 79
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 60
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 60
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000005266 casting Methods 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 239000004411 aluminium Substances 0.000 claims description 35
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 17
- 239000010949 copper Substances 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 238000005304 joining Methods 0.000 claims description 5
- 239000000178 monomer Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000003475 lamination Methods 0.000 description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0012—Manufacturing cage rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
- H02K17/20—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors having deep-bar rotors
Abstract
The invention provides a manufacture method of an induction motor and a rotor thereof. According to the invention, the efficiency of the induction motor can be improved through reducing the resistance of the secondary conductor of the induction motor. A rod-shaped good conductor component (70) whose conductivity is larger than aluminum is inserted into a narrow slot (62) of an iron core and the periphery and the end ring (37) of the good conductor component (70) are formed through aluminum casting. The end ring (37) and the good conductor component (70) are jointed together through friction stirring joint.
Description
The application advocates the priority of No. 2014-034950th, the Japanese patent application based on application on February 26th, 2014.The full content of this Japanese publication is by reference to being applied in this specification.
Technical field
The present invention relates to a kind of induction motor.
Background technology
Usually, in induction motor, the resistance of the secondary conductor side that induced current flows through more fractional motor efficiency more improves.Such as, record the resistance in order to reduce secondary conductor side in patent documentation 1 and make aluminium and conductivity be present in technology in the slit of the rotor of cage induction motor higher than the copper cash of aluminium simultaneously.
Patent documentation 1: Japanese patent application 2012-258721 publication
Patent documentation 2: Japanese patent application 2011-188703 publication
If cast aluminum is to manufacture rotor after the good conductors such as copper or silver being reduced material as resistance and being inserted in the slit of rotor, then because of the illiquidity of molten aluminum, aluminium cannot fully flow into good conductor parts surface concavo-convex in, the generation space, interface likely between aluminium and good conductor parts or form oxide-film.When flowing through the conductor in slit at electric current, space and the oxide-film of joint interface play a role as resistance, therefore likely expectedly cannot reduce the resistance of secondary conductor side.
Summary of the invention
The present invention completes in view of this situation, and its object is to provides a kind of resistance of the secondary conductor by reducing induction motor to improve the technology of the efficiency of induction motor.
One embodiment of the present invention relate to a kind of induction motor.Induction motor has rotor.Rotor is formed as follows: in the slit being formed at iron core, insert the good conductor parts of conductivity higher than the strip of aluminium, and after the surrounding forming good conductor parts by aluminum casting and end ring, makes end ring and good conductor parts be engaged by friction-stir and engage.
According to which, oxide skin(coating) and the space at the interface of aluminium and good conductor parts can be removed, and significantly can reduce the resistivity at interface, the efficiency of induction motor can be improved thus.
In addition, that the combination in any of above constitutive requirements, constitutive requirements of the present invention and expression are mutually replaced between method, device, system etc. is also effective as mode of the present invention.
According to the present invention, the efficiency of induction motor can be improved by the resistance of the secondary conductor reducing induction motor.
Accompanying drawing explanation
Cutaway view when Fig. 1 is the vertical plane cutting cage induction motor comprising central shaft.
Fig. 2 is the enlarged drawing at the interface of good conductor parts and molten aluminum.
Fig. 3 is the stereogram of the rotor of induction motor involved by execution mode.
Fig. 4 (a) ~ Fig. 4 (c) is the figure of a part for the manufacturing process representing rotor.
Fig. 5 (a) and Fig. 5 (b) is the figure of a part for the manufacturing process representing rotor.
Fig. 6 (a) and Fig. 6 (b) is the figure of a part for the manufacturing process representing rotor.
Fig. 7 (a) and Fig. 7 (b) is the cutaway view at the interface of aluminium and good conductor parts (i.e. copper).
Fig. 8 is the figure of the measurement result of the resistance value at the interface representing the sample imitating rotor.
In figure: 10-induction motor, 12-rotating shaft, 14-flange, 16-bearing, 18-fan, 30-frame, 32-fan guard, 34-stator, 36-rotor, 36a-slit, 37-end ring, 38-coil, 40-fin, 60-iron core, 62-slit, 64-end ring, 66-strip conductor, 68-lamination, 70-good conductor parts, 72-circular port, 80-molding box.
Embodiment
Cutaway view when Fig. 1 is the vertical plane cutting cage induction motor 10 comprising central shaft.
Stator 34 is by being formed the electromagnetic steel plate lamination of multiple lamellar (such as thickness is 0.5mm) that be die-cut into same shape.Stator 34 is such as embedded in the inner circumferential of frame 30 by shrink fit.In the multiple slits being formed at stator 34, winding is provided with copper coil 38.
Rotor 36 will be also by being die-cut into the multiple laminal electromagnetic steel plate lamination of identical toroidal and being formed.Rotor 36 central authorities be formed for make rotating shaft 12 inserted through circular port, and at outer circumferential side to be formed with the slit 62 of the multiple same shapes radially extended at equal intervals.The circular port of rotor 36 is fixed on rotating shaft 12 by interference fit.
Frame 30 is such as made up of die casting aluminium, cast iron or steel plate, its have supporting rotor and stator weight and by the effect to motor external cooling of the heat that produces in rotor and stator etc.In order to improve heat dispersion, be provided with the multiple fin 40 extended along the direction parallel with rotating shaft in the periphery of frame 30.
Rotating shaft 12 is rotatably freely supported on the flange 14,15 extended from the both sides of frame 30 to internal side diameter respectively via bearing 16,17.Flange 14,15 can form as one with frame 30, also can be fixed on frame 30 after being formed separately.
Fan 18 is configured with in the rear end side of rotating shaft 12.Fan guard 32 is configured with in the outside of fan 18.
Usually, in induction motor, the resistance of the secondary conductor side that induced current flows through more fractional motor efficiency more improves.Therefore, the most often use and aluminium higher for conductivity is cast to by die casting the method be formed in the slit 62 of rotor 36.Now, can form in the both ends of the surface of rotor 36 end ring (short-circuited conducting sleeve) 37 become one structure with the strip conductor 66 in slit.
In order to improve the efficiency of induction motor further, propose the method for cast aluminum under the state that will be inserted into higher than parts of forming of good conductor such as the copper of aluminium or silver by conductivity in slit.But, as shown in Figure 2, in the method, because of the illiquidity of molten aluminum, aluminium cannot fully flow into good conductor parts surface concavo-convex in or solidified aluminum time occur thermal contraction, therefore likely between aluminium and good conductor parts, produce space.When electric current flows through slit inner wire, the space of joint interface plays a role as resistance, even if be therefore inserted in slit by good conductor parts such as copper or silver, also expectedly cannot reduce the resistance of secondary conductor side.
Therefore, in present embodiment by improving to the structure of rotor and manufacture method the resistance reducing secondary conductor side.
Fig. 3 is the stereogram of the rotor 36 of induction motor 10 involved by execution mode.Rotor 36 mainly possesses: iron core (iron core) 60, two end ring 37a, 37b and multiple strip conductor 66.
Iron core 60 is the cylinder part of magnetic part.Iron core 60 is provided with multiple slit 62.Further, in the circular port 72 of iron core 60, rotating shaft (not shown in Fig. 3) is fixed with by interference fit.
Multiple strip conductor 66 is formed as corresponding with multiple slit 62 and runs through these multiple slits.Describe in detail later, strip conductor 66 has: conductivity higher than the strips such as the copper of aluminium or silver good conductor parts, be formed at the aluminium lamination of the surrounding of this good conductor by aluminum casting.The number of strip conductor 66 is not particularly limited, and can design according to the kind of motor or purposes.
End ring 37a, 37b are juxtaposed on the both ends of iron core 60, as aftermentioned, by aluminum casting, form as one with the aluminium lamination of multiple strip conductor 66.End ring 37a makes one end of multiple strip conductor 66 be electrically connected, and end ring 37b makes the other end of multiple strip conductor 66 be electrically connected.
Then, the manufacture method of rotor 36 is described.
Fig. 4 (a) ~ Fig. 4 (c), Fig. 5 (a), Fig. 5 (b) and Fig. 6 (a), Fig. 6 (b) are the figure of the manufacturing process representing rotor 36.
The manufacturing process of iron core 60 shown in Fig. 4 (a).Iron core 60 will be by having multiple laminations 68 lamination of same shape and be formed.Such as, lamination 68 manufactures by electromagnetic steel plate punching press is formed as ring-type.Each lamination 68 offers porose 69, this hole 69 lamination and become the slit 62 of iron core 60.
Then, as shown in Fig. 4 (b), inserted through the good conductor parts 70 of the strip of a part for formation strip conductor 66 in each slit 62 of iron core 60.As shown in Fig. 4 (c), the slit 62 of iron core 60 is formed as maintaining unnecessary gap relative to good conductor parts 70.In the aluminum casting operation of rear class, aluminium is flow in this gap.That is, iron core 60 also plays a role as a part for the molding box in aluminum casting operation.
Fig. 5 (a) represents the structure of the rotor 36 carried out before aluminum casting operation.As shown in Fig. 5 (b), this structure is contained in the molding box 80 of the aluminium lamination around for the formation of end ring 37 and good conductor parts 70, molten aluminum of casting in molding box 80.The inwall of molding box shown in Fig. 5 (b).In order to improve the mobility of molten aluminum, additive (such as silicon or zinc) can be added.In addition, consider conductance, preferred zinc.
Fig. 6 (a) represents the rotor 36 just carried out after aluminum casting operation.In this condition, likely there is at good conductor parts 70 and the interface (dash area) of end ring 37a space or oxide-film that the conductivity at interface is declined.Therefore, in present embodiment, after carrying out aluminum casting operation, joining process is implemented to end ring 37 and good conductor parts 70, to become the state except oxide layer and space.
Fig. 6 (b) is the figure representing joining process.Friction-stir is utilized to engage in present embodiment.In friction-stir engages, while the instrument 90 front end with projection (gauge head) 92 presses to good conductor parts 70 and end ring 37, instrument 90 is rotated.Material is softened by frictional heat, and different metals engages by stirring (plastic flow automation).As shown in dotted line in Fig. 6 (b), instrument 90 can to after the scanning of good conductor parts 70, to be positioned at the good conductor parts 70 of its opposite side while scan.Or, also can move along the square-section of good conductor parts 70.
It is more than the manufacture method of rotor 36.Then, the advantage of rotor 36 is described.
In order to confirm the advantage of rotor 36, producing the sample of the bonding part of simulation end ring 37 and good conductor parts 70, and measuring its characteristic.
Fig. 7 (a) and Fig. 7 (b) is the cutaway view at the interface of aluminium and good conductor parts (i.e. copper).Fig. 7 (a) is cross-section photograph, and Fig. 7 (b) is aluminium, copper, oxygen distribution map separately.As shown in Fig. 7 (b), at interface, aluminium and copper engage with the form of mutually adulterating.Further, as shown in Fig. 7 (b), oxygen integrated distribution is not observed in the appearance at interface.This means that oxidation film layer and the space at interface are removed.
Fig. 8 is the figure of the measurement result of the resistance value representing example interface.The resistance value that aluminium monomer (A1050) shown in Figure 8, copper monomer (C110), the sample (hybrid, mixture) that aluminium and copper engaged by friction-stir are respective.It can thus be appreciated that the resistance value of the sample that friction-stir engages is lower than the resistance value of aluminium monomer.Known to the present inventor etc., when engaging aluminium and copper, the resistance value at its composition surface (interface) is greater than the resistance value of aluminium monomer usually in the past, and therefore obtaining this low resistance is a kind of epochal discovery.
As mentioned above, in the rotor 36 involved by execution mode, oxide skin(coating) and the space at the interface of aluminium and good conductor parts can be removed, and significantly can reduce the resistivity at interface.Thereby, it is possible to improve the efficiency of induction motor.
By utilizing copper in strip conductor 66, with manufactured the situation of strip conductor 66 by aluminum casting compared with, the weight of rotor 36 can increase.But in many purposes of induction motor, rotor 36 not frequently carries out acceleration and deceleration, and therefore the decline of efficiency can not become problem.On the contrary, can say that the advantage obtained by the increase of inertia is larger.
Above, embodiments of the present invention are illustrated.These execution modes, for illustrating, it will be appreciated by those skilled in the art that in the combination of these each constitutive requirements there is various variation, and this variation also belong to scope of the present invention.
Above, to using aluminium as mother metal, using the example of copper to be illustrated as good conductor parts, but above-mentioned execution mode is not limited to this combination, as long as use conductivity higher than the good conductor parts of mother metal, then can be applicable to combination in any.Such as, copper can be used as mother metal, silver is used as good conductor parts.
Formed by aluminum casting under the state that end ring 37 also can run through end ring 37 at good conductor parts 70.
Claims (8)
1. an induction motor, is characterized in that,
Possesses the following rotor formed: in the slit being formed at iron core, insert the good conductor parts of conductivity higher than the strip of aluminium, and after the surrounding forming described good conductor parts by aluminum casting and end ring, make described end ring be engaged by friction-stir with described good conductor parts and engage.
2. an induction motor, is characterized in that,
Possesses the following rotor formed: in the slit being formed at iron core, insert the good conductor parts of conductivity higher than aluminium, and after the surrounding forming described good conductor parts by aluminum casting and end ring, joining process is implemented, to become the state except oxide layer and space to described end ring and described good conductor parts.
3. induction motor according to claim 2, is characterized in that,
Described end ring and described good conductor parts are engaged by friction-stir and engage.
4. induction motor according to any one of claim 1 to 3, is characterized in that,
At the interface of described end ring and described good conductor parts, the aluminium forming described end ring and the metal forming described good conductor parts engage with the form of mutually adulterating.
5. an induction motor, is characterized in that,
Possesses the following rotor formed: in the slit being formed at iron core, insert the good conductor parts of conductivity higher than aluminium, and after the surrounding forming described good conductor parts by aluminum casting and end ring, joining process is implemented to described end ring and described good conductor parts, becomes the form of mutually adulterating to make the metal of the aluminium of the described end ring of formation and the described good conductor parts of formation at the interface of described end ring and described good conductor parts.
6. an induction motor, is characterized in that,
Possesses the following rotor formed: in the slit being formed at iron core, insert the good conductor parts of conductivity higher than aluminium, and after the surrounding forming described good conductor parts by aluminum casting and end ring, joining process is implemented, to make the resistivity of resistivity lower than aluminium monomer at the interface of described end ring and described good conductor parts to described end ring and described good conductor parts.
7. induction motor according to any one of claim 1 to 6, is characterized in that,
Described good conductor parts comprise copper or silver.
8. a manufacture method for the rotor of induction motor, is characterized in that, possesses following steps:
The good conductor parts of conductivity higher than the strip of aluminium are inserted in the slit being formed at iron core;
Surrounding and the end ring of described good conductor parts is formed by aluminum casting; And
Described end ring and described good conductor parts are made to be engaged by friction-stir and engage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014034950A JP2015162913A (en) | 2014-02-26 | 2014-02-26 | Induction motor and manufacturing method of rotor thereof |
| JP2014-034950 | 2014-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104868622A true CN104868622A (en) | 2015-08-26 |
Family
ID=53782610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510088667.6A Pending CN104868622A (en) | 2014-02-26 | 2015-02-26 | Manufacture Method Of Induction Motor And Rotor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2015162913A (en) |
| CN (1) | CN104868622A (en) |
| DE (1) | DE102015102420A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107925324A (en) * | 2015-12-08 | 2018-04-17 | 宝马股份公司 | Rotor, the method for manufacturing rotor, asynchronous machine and vehicle |
| CN107925322A (en) * | 2015-12-08 | 2018-04-17 | 宝马股份公司 | Rotor, the method for manufacturing rotor, asynchronous machine and vehicle |
| CN111903037A (en) * | 2018-03-16 | 2020-11-06 | 三菱电机株式会社 | Rotor of induction motor and induction motor |
| CN112600322A (en) * | 2020-11-16 | 2021-04-02 | 超音速智能技术(杭州)有限公司 | Small-size motor closed slot cast aluminum rotor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015224579A1 (en) | 2015-12-08 | 2017-06-08 | Bayerische Motoren Werke Aktiengesellschaft | Rotor, method of manufacturing a rotor, asynchronous machine and vehicle |
| FR3095091B1 (en) * | 2019-04-11 | 2022-04-08 | Favi Le Laiton Injecte | method of manufacturing a bi-material squirrel cage rotor |
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2014
- 2014-02-26 JP JP2014034950A patent/JP2015162913A/en active Pending
-
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- 2015-02-20 DE DE102015102420.9A patent/DE102015102420A1/en not_active Withdrawn
- 2015-02-26 CN CN201510088667.6A patent/CN104868622A/en active Pending
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| EP1347560A1 (en) * | 2000-12-27 | 2003-09-24 | Hitachi, Ltd. | Dynamo-electric machine |
| JP2003289655A (en) * | 2002-03-27 | 2003-10-10 | Honda Motor Co Ltd | Cage rotor |
| JP2004236456A (en) * | 2003-01-31 | 2004-08-19 | Honda Motor Co Ltd | Rotor of induction motor, and manufacturing method for rotor of induction motor |
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| JP2009165215A (en) * | 2007-12-28 | 2009-07-23 | Hitachi Ltd | Squirrel cage rotor of polyphase induction motor, and manufacturing method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107925324A (en) * | 2015-12-08 | 2018-04-17 | 宝马股份公司 | Rotor, the method for manufacturing rotor, asynchronous machine and vehicle |
| CN107925322A (en) * | 2015-12-08 | 2018-04-17 | 宝马股份公司 | Rotor, the method for manufacturing rotor, asynchronous machine and vehicle |
| US10454351B2 (en) | 2015-12-08 | 2019-10-22 | Bayerische Motren Werke Aktiengesellschaft | Rotor, method for producing a rotor, asynchronous machine, and vehicle |
| US10461616B2 (en) | 2015-12-08 | 2019-10-29 | Bayerische Motoren Werke Aktiengesellschaft | Rotor, method for producing a rotor, asynchronous machine, and vehicle |
| CN107925322B (en) * | 2015-12-08 | 2020-08-25 | 宝马股份公司 | Rotor, method for producing a rotor, asynchronous machine and vehicle |
| CN111903037A (en) * | 2018-03-16 | 2020-11-06 | 三菱电机株式会社 | Rotor of induction motor and induction motor |
| CN111903037B (en) * | 2018-03-16 | 2021-08-17 | 三菱电机株式会社 | Rotor of induction motor and induction motor |
| CN112600322A (en) * | 2020-11-16 | 2021-04-02 | 超音速智能技术(杭州)有限公司 | Small-size motor closed slot cast aluminum rotor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015162913A (en) | 2015-09-07 |
| DE102015102420A1 (en) | 2015-08-27 |
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